Cita APA

BROWN, L. R. (1995). Tanda-tanda Zaman Era 90-an / Lester R. Brown. Obor.

Chicago Style (17th ed.) Citation

BROWN, Lestern R. Tanda-tanda Zaman Era 90-an / Lester R. Brown. Obor, 1995.

Cita MLA

BROWN, Lestern R. Tanda-tanda Zaman Era 90-an / Lester R. Brown. Obor, 1995.